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Filtering by: Subject Geology -- Oregon -- Clatsop County Remove constraint Subject: Geology -- Oregon -- Clatsop County

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Geology of the Saddle and Humbug Mountain area, Clatsop County, northwestern Oregon

Creator:

Penoyer, Peter E.

Abstract:

Six early to middle Tertiary geologic units crop out in the Saddle and Humbug Mountain area. They include the late Eocene to early Miocene Oswald West muds tones, the lower Silver Point and the upper Silver Point tongues of the middle Miocene Astoria Formation, and the middle Miocene Depoe Bay...

Resource Type:

Masters Thesis
Geology of the Green Mountain-Young's River area, Clatsop County, northwest Oregon

Creator:

Peterson, Carolyn Pugh

Abstract:

The upper Eocene to lower Oligocene Oswald West mudstone is the oldest formation (informal) in the Green Mountain-Young's River area. This 1,663 meter thick hemipelagic sequence was deposited in a low-energy lower to upper slope environment in the Coast Range forearc basin. The formation ranges from the late Narizian to...

Resource Type:

Masters Thesis
Environmental and engineering geology of the Astoria Peninsula Area Clatsop County, Oregon

Creator:

Carter, James Warren

Resource Type:

Masters Thesis
Geology of the Fishhawk Falls--Jewell area, Clatsop County, northwest Oregon

Creator:

Nelson, David Ezra

Abstract:

Plate 1 dimensions: 46 x 25 Plate 2 dimensions: 50 x 31 Plate 3 dimensions: 21 x 24.5 Plate 4 dimensions: 18 x 24.5

Resource Type:

Masters Thesis
Geology of the Hamlet-North Fork of the Nehalem River area, southern Clatsop and northernmost Tillamook Counties, northwest Oregon

Creator:

Rarey, Phillip Jay

Abstract:

The middle to late Eocene tholeiitic Tillamook Volcanics compose the oldest rock unit in the Hamlet-North Fork of the Nehalem River area. Geochemical plots and field relationships indicate that these rocks were produced in an extensional tectonic setting in the developing forearc and formed an extensive tholeiltic oceanic island. The...

Resource Type:

Masters Thesis
Geology of the Rock Creek-Green Mountain area, southeast Clatsop and northernmost Tillamook counties, northwest Oregon

Creator:

Safley, L. Eugene

Abstract:

The middle to upper Eocene Tillamook Volcanics form the volcanic core or basement rocks in the Rock Creek-Green Mountain area. They consist of a thick sequence of high TiO2 tholeiitic basalt, basaltic andesite, and andesite subaerial flows and breccias. Detailed mapping, petrography, major oxide plots, magnetic polarity, and radiometric age...

Resource Type:

Masters Thesis
Geology of the Seaside-Young's River Falls area, Clatsop County, Oregon

Creator:

Tolson, Patrick Marion

Abstract:

Eight Tertiary geologic units crop out in the Seaside-Young's River Falls area, including late Oligocene to early Miocene Oswald West mudstones; Angora Peak sandstone and Silver Point members of the middle Miocene Astoria Formation, and middle Miocene Depoe Bay and Cape Foulweather Basalts. Three new lithologically distinct units, the 'J'...

Resource Type:

Masters Thesis
Geology of the Elsie-lower Nehalem River area, south-central Clatsop and northern Tillamook counties, northwestern Oregon

Creator:

Mumford, Daniel Franklin

Abstract:

The middle Eocene Tillamook Volcanics form the oldest rock unit in the Elsie-lower Nehalem River area. K-Ar age determinations and age constraints imposed by foraminiferal and calcareous nannofossil assemblages of overlying sedimentary strata indicate an absolute age of about 42 Ma for the uppermost Tillamook Volcanics. Major oxide values indicate...

Resource Type:

Masters Thesis
Stratigraphy and sedimentation of the Onion Peak area, Clatsop County, Oregon

Creator:

Smith, Thomas N.

Abstract:

Six Tertiary units are exposed in the Onion Peak area near the town of Cannon Beach., Oregon. The units consist of: late Eocene to early Miocene Oswald West mudstones (informal), middle Miocene Astoria Formation (Angora Peak sandstone and Silver Point mudstone members.-informal), middle Miocene basalts of intrusive and extrusive Depoe...

Resource Type:

Masters Thesis
Stratigraphy, sedimentation, and petrology of the Tertiary rocks in the Bear Creek-Wickiup Mountain-Big Creek area, Clatsop County, Oregon

Creator:

Coryell, George Fossas

Abstract:

Six Tertiary rock units are exposed in the Bear Creek-Wickiup Mountain-Big Creek area. They are: the late Oligocene to early Miocene Oswald West mudstones; the Big Creek sandstone member, the Pipeline member (a new unit), and the Silver Point mudstone member of the early to middle Miocene Astoria Formation; and...

Resource Type:

Masters Thesis

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Academic Affiliation

Geology15

Advisor

Niem, Alan R.9
Niem, Alan2
Lawrence, Robert D.1
Niem, A. R.1
Niem, Al1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1974 to 1989

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Committee Member

Enlows, Harold E.1

Creator

Carter, James Warren1
Coryell, George Fossas1
Cressy, Frank Beecher1
Goalen, Jeffrey Scott1
Mumford, Daniel Franklin1
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Date

Date range begin – Date range end

Current results range from 1973 to 1989

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Decade

1980-19897
1970-19798

Degree Field

Geology15

Degree Level

Master's15

Degree Name

Master of Science (M.S.)15

Language

English [eng]15

Non-Academic Affiliation

Oregon State University. Graduate School15

Peer Reviewed

No12

Resource Type

Masters Thesis15

Rights Statement

Copyright Not Evaluated15

Subject

Geology -- Oregon -- Clatsop County[remove]15
Geology -- Oregon -- Tillamook County3
Geochemistry -- Oregon -- Clatsop County1
Geology -- Oregon -- Green Mountain Region1
Geology -- Oregon -- Nehalem River Valley1
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